Health
Enter DSRDMRM as a password. Your character will always have full health. Note: This code has no effect in the tournament modes.

Infinite Shuriken
Enter RSRLRSM as a password.

Lose Shuriken
Enter RLMRDSL as a password. Your Shuriken will be disabled. Note: This code has no effect in the tournament modes.

Mighty Turtle
Enter LSDRRDR as a password. Your characters will no longer be hurt by damage.

Abyss
Enter SDSDRLD as a password. You will lose all health after falling. Note: This code has no effect in the tournament modes.

Challenge Mode Endurance
Enter MRMDRMD as a password. Stamina restore will no longer be available.

Character's Feet Pass Through Wall
Whenever you do a wall-jump, look very carefully to see that your character's toes (or sometimes even their feet) are passing through the wall.

Fatal Blow
Enter LRSRDRD as a password. Enemies have one-hit kill ability. Note: This code has no effect in the tournament modes.

New Nexus outfit for Donatello
Enter DSLRDRM as a password.

New Nexus outfit for Leonardo
Enter LMRMDRD as a password.

New Nexus outfit for Michelangelo
Enter MLMRDRM as a password.

New Nexus outfit for Raphael
Enter RMSRMDR as a password.

Nightmare
Enter SLSDRDL as a password. All enemies will have their attacks doubled. Note: This code has no effect in the tournament modes.

Use the following key when entering the passwords:

L: Leonardo
M: Michaelangelo
D: Donatello
R: Raphael
S: Shredder

Pizza Paradise
Enter MRLMRMR as a password. All health items will be replaced by full HP pizzas. Note: This code has no effect in the tournament modes.

Play as Casey Jones
Win the Open Brawl Tournament. Alternately, Casey Jones is unlocked five days after a saved game file is created; you can change the system date to do this. Casey Jones replaces Raphael.

Play as Karai
Defeat Karai in the Foot Fight Tournament in less than 150 seconds. Alternately, Karai is unlocked thirty five days after a saved game file is created; you can change the system date to do this. Karai replaces Michaelangelo.

Play as Slashuur
Win the Battle Nexus Tournament. Alternately, Slashuur is unlocked forty five days after a saved game file is created; you can change the system date to do this. Slashuur replaces Leonardo.

Play as Splinter
Successfully complete level 11-7. Alternately, Splinter is unlocked ten days after a saved game file is created; you can change the system date to do this. Splinter replaces Donatello.

Playmates unlocked in bonus materials
Enter SRMLDDR as a password.

Poison
Enter DRSLLSR as a password. Your character will slowly lose HP. Note: This code has no effect in the tournament modes.

Self Recovery
Enter DRMSRLR as a password. Your character will slowly regain HP. Note: This code has no effect in the tournament modes.

Squeaking
Enter MLDSRDM as a password. Alternate sounds will play when objects are hit. Note: This code has no effect in the tournament modes.

Super Defense Power
Enter LDRMRLM as a password. Your defense will be doubled. Note: This code has no effect in the tournament modes.

Super Offense Power
Enter SDLSRLL as a password. Your attacks will be doubled. Note: This code has no effect in the tournament modes.

Super-Tough
Enter RDSRMRL as a password. All enemies will have their defense doubled. Note: This code has no effect in the tournament modes.

Teenage Mutant Ninja Turtles arcade game
Find the Teenage Mutant Ninja Turtles arcade game during Mission 9-1 and use it to play the classic arcade game.

Toddling
Enter SSSMRDD as a password. Alternate sounds will play when you walk. Note: This code has no effect in the tournament modes.

if you cannot download trainer then go to Chrome/Firefox's settings, specifically to the Privacy settings and simply unchecking the "Enable phishing and malware protection" option.

Some Game Trainers are sometimes reported to be a Virus or Trojan,
the most common is a keylogger called HotKeysHook or the file
has been packed/protected with VMProtect or Themida and
is recognized as Win32/Packed.VMProtect or Win32/Packed.Themida.
In ALL cases this is a FALSE ALARM as NONE
of the Game Trainers @ GCW contain known malicious code! More info in
the PC
Games FAQ!